Analysis of Biologically Active Oxyprenylated Ferulic Acid Derivatives in Citrus Fruits
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Abstract
4′-Geranyloxyferulic (GOFA) and boropinic acid have been discovered during the last decade as interesting phytochemicals having valuable pharmacological effects as cancer chemopreventive, anti-inflammatory, neuroprotective, and anti-Helicobacter pylori agents. A reverse-phase HPLC-UV/Vis method for the separation and quantification of the title oxyprenylated ferulic acid derivatives in extracts obtained from peels of nine edible Citrus and Fortunella fruits was successfully applied. Concentration values showed a great variation between the different species, being orange (C. sinensis) the fruit richest in GOFA (0.141 ± 0.011 mg/g of exocarp fresh weight) and kumquat (Fortunella japonica) the one in which boropinic acid was recorded as the most abundant phytochemical (0.206 ± 0.002 mg/g of exocarp fresh weight). Both secondary metabolites were not detected only in three species. The set-up methodology showed limits of quantification (LOQ) values, that were able to selectively quantify both GOFA and boropinic acid. Results described herein depict a potential chemopreventive dietary feeding role for the Rutaceae spp. under investigation.
Keywords
Boropinic acid Citrus spp 4′-Geranyloxyferulic acid RutaceaeAbbreviations
- GOFA
4′-Geranyloxyferulic acid
- HPLC
High performance liquid chromatography
- LC
Liquid chromatography
- LOD
Limit of detection
- LOQ
Limit of quantification
- ND
Not detected
- QC
Quality control
- RP
Reverse phase
- RSD
Relative standard deviation
- R.t.
Room temperature
- SD
Standard deviation
- S/N
Signal to noise
- Spp.
Species
- UV
Ultraviolet
- Vis
Visible
Notes
Acknowledgments
Financial support to this research from the University “G. D’Annunzio” of Chieti-Pescara was gratefully acknowledged. Authors wish to thank Angela Cammisa and Paolo Di Vincenzo for their friendly and active collaboration to this work.
Conflict of Interest
All authors confirmed that they have no conflict of interest.
Studies with Humans or Animals
This article does not contain any studies with human or animal subjects.
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